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local_test_cluster.go
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local_test_cluster.go
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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//
// Author: Spencer Kimball (spencer.kimball@gmail.com)
package localtestcluster
import (
"testing"
"time"
"github.com/opentracing/opentracing-go"
"golang.org/x/net/context"
"github.com/cockroachdb/cockroach/pkg/base"
"github.com/cockroachdb/cockroach/pkg/gossip"
"github.com/cockroachdb/cockroach/pkg/internal/client"
"github.com/cockroachdb/cockroach/pkg/roachpb"
"github.com/cockroachdb/cockroach/pkg/rpc"
"github.com/cockroachdb/cockroach/pkg/settings"
"github.com/cockroachdb/cockroach/pkg/storage"
"github.com/cockroachdb/cockroach/pkg/storage/engine"
"github.com/cockroachdb/cockroach/pkg/util/hlc"
"github.com/cockroachdb/cockroach/pkg/util/log"
"github.com/cockroachdb/cockroach/pkg/util/metric"
"github.com/cockroachdb/cockroach/pkg/util/retry"
"github.com/cockroachdb/cockroach/pkg/util/stop"
"github.com/cockroachdb/cockroach/pkg/util/tracing"
)
// A LocalTestCluster encapsulates an in-memory instantiation of a
// cockroach node with a single store using a local sender. Example
// usage of a LocalTestCluster follows:
//
// s := &LocalTestCluster{}
// s.Start(t, testutils.NewNodeTestBaseContext(),
// kv.InitSenderForLocalTestCluster)
// defer s.Stop()
//
// Note that the LocalTestCluster is different from server.TestCluster
// in that although it uses a distributed sender, there is no RPC traffic.
type LocalTestCluster struct {
Manual *hlc.ManualClock
Clock *hlc.Clock
Gossip *gossip.Gossip
Eng engine.Engine
Store *storage.Store
StoreTestingKnobs *storage.StoreTestingKnobs
DBContext *client.DBContext
DB *client.DB
RangeRetryOptions *retry.Options
Stores *storage.Stores
Sender client.Sender
Stopper *stop.Stopper
Latency time.Duration // sleep for each RPC sent
tester testing.TB
DontRetryPushTxnFailures bool
}
// InitSenderFn is a callback used to initiate the txn coordinator (we don't
// do it directly from this package to avoid a dependency on kv).
type InitSenderFn func(
nodeDesc *roachpb.NodeDescriptor,
tracer opentracing.Tracer,
clock *hlc.Clock,
latency time.Duration,
stores client.Sender,
stopper *stop.Stopper,
gossip *gossip.Gossip,
) client.Sender
// Start starts the test cluster by bootstrapping an in-memory store
// (defaults to maximum of 50M). The server is started, launching the
// node RPC server and all HTTP endpoints. Use the value of
// TestServer.Addr after Start() for client connections. Use Stop()
// to shutdown the server after the test completes.
func (ltc *LocalTestCluster) Start(t testing.TB, baseCtx *base.Config, initSender InitSenderFn) {
ambient := log.AmbientContext{Tracer: tracing.NewTracer()}
nc := &base.NodeIDContainer{}
ambient.AddLogTag("n", nc)
nodeID := roachpb.NodeID(1)
nodeDesc := &roachpb.NodeDescriptor{NodeID: nodeID}
ltc.tester = t
ltc.Manual = hlc.NewManualClock(123)
ltc.Clock = hlc.NewClock(ltc.Manual.UnixNano, 50*time.Millisecond)
ltc.Stopper = stop.NewStopper()
rpcContext := rpc.NewContext(ambient, baseCtx, ltc.Clock, ltc.Stopper)
server := rpc.NewServer(rpcContext) // never started
ltc.Gossip = gossip.New(ambient, nc, rpcContext, server, ltc.Stopper, metric.NewRegistry())
ltc.Eng = engine.NewInMem(roachpb.Attributes{}, 50<<20)
ltc.Stopper.AddCloser(ltc.Eng)
ltc.Stores = storage.NewStores(ambient, ltc.Clock)
ltc.Sender = initSender(nodeDesc, ambient.Tracer, ltc.Clock, ltc.Latency, ltc.Stores, ltc.Stopper,
ltc.Gossip)
if ltc.DBContext == nil {
dbCtx := client.DefaultDBContext()
ltc.DBContext = &dbCtx
}
ltc.DB = client.NewDBWithContext(ltc.Sender, ltc.Clock, *ltc.DBContext)
transport := storage.NewDummyRaftTransport()
cfg := storage.TestStoreConfig(ltc.Clock)
// By default, disable the replica scanner and split queue, which
// confuse tests using LocalTestCluster.
if ltc.StoreTestingKnobs == nil {
cfg.TestingKnobs.DisableScanner = true
cfg.TestingKnobs.DisableSplitQueue = true
} else {
cfg.TestingKnobs = *ltc.StoreTestingKnobs
}
if ltc.RangeRetryOptions != nil {
cfg.RangeRetryOptions = *ltc.RangeRetryOptions
}
cfg.DontRetryPushTxnFailures = ltc.DontRetryPushTxnFailures
cfg.AmbientCtx = ambient
cfg.DB = ltc.DB
cfg.Gossip = ltc.Gossip
active, renewal := storage.NodeLivenessDurations(
storage.RaftElectionTimeout(cfg.RaftTickInterval, cfg.RaftElectionTimeoutTicks))
cfg.NodeLiveness = storage.NewNodeLiveness(
cfg.AmbientCtx,
cfg.Clock,
cfg.DB,
cfg.Gossip,
active,
renewal,
)
cfg.StorePool = storage.NewStorePool(
cfg.AmbientCtx,
cfg.Gossip,
cfg.Clock,
storage.MakeStorePoolNodeLivenessFunc(cfg.NodeLiveness),
settings.TestingDuration(storage.TestTimeUntilStoreDead),
/* deterministic */ false,
)
cfg.Transport = transport
cfg.MetricsSampleInterval = metric.TestSampleInterval
cfg.HistogramWindowInterval = metric.TestSampleInterval
ltc.Store = storage.NewStore(cfg, ltc.Eng, nodeDesc)
if err := ltc.Store.Bootstrap(roachpb.StoreIdent{NodeID: nodeID, StoreID: 1}); err != nil {
t.Fatalf("unable to start local test cluster: %s", err)
}
ltc.Stores.AddStore(ltc.Store)
if err := ltc.Store.BootstrapRange(nil); err != nil {
t.Fatalf("unable to start local test cluster: %s", err)
}
if err := ltc.Store.Start(context.Background(), ltc.Stopper); err != nil {
t.Fatalf("unable to start local test cluster: %s", err)
}
nc.Set(context.TODO(), nodeDesc.NodeID)
if err := ltc.Gossip.SetNodeDescriptor(nodeDesc); err != nil {
t.Fatalf("unable to set node descriptor: %s", err)
}
}
// Stop stops the cluster.
func (ltc *LocalTestCluster) Stop() {
// If the test has failed, we don't attempt to clean up: This often hangs,
// and leaktest will disable itself for the remaining tests so that no
// unrelated errors occur from a dirty shutdown.
if ltc.tester.Failed() {
return
}
if r := recover(); r != nil {
panic(r)
}
ltc.Stopper.Stop(context.TODO())
}